Yarn-feeding device for knitting-machines.



H. SWINGLEHURST. YAXIN PEEDIHG DEVI'GE FOP-KNITTING MACHINES. urmonlonilun JULY 13, 1912. 1,124,07 Patented Jan. 5,1915.

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iwxmrzssss INVENTOR HARRY SWINGLEHURST 51 BY HIS ATTORNEY 6144 01 JW 11 SWINGLEHURST. YARN FEEDING DEVIGE'FOR KNITTING MACHINES.

I APPLICATIONFILEDJULY13,191Z. 1,124,076;

1 Patented Jan. 5, 1915.

'3 SHEETS-SHEET 2. V

I I 60 f 62 r ,1 f 40 4/ P HARRY SWINGLEHURST BY ms ATTORNEY I/WW V H, SWINGLEHHRST. YARHFBEDWG DEVICE FOR KNITTIHG MACHINES. APPLIGATIO}? FILED 3431113, 1912. 1,124,076 Patented Jan 5, 1915.

3 SHEETS-SHEET 3.

WITNESSES la INVENTOR [3Z9 HARRY SWINGLEHURST ;mk"a;yr M BY HIS ATTORNEY mm: Pnzls. Inc. mm. Immcrm. 0 L

ting: machines in which,

ofa-ntoinatio-mechanism, one yarn is sub A, UNITEB srares FATENT orsion sass sivziqsnasonsrer rnxnanaarnra, PENNSYLVANIA, ASSIG-NOBJTG sco'r'r ve WILLIAMS, INCORPORATED, or PHILALELPHIA, :emmsrnvsma; a eonroaarIc-N '1 as mesa-I.

' [semi-enemas names rees- VKNETTHEGQQIACHINES.

Ll i g'zfi.

T all who/nit may] concern:

qBerit. known that I, Haanr SWiNGL-E- BURST, a CltlZEaILOf the lnitecl States, residin-g Philadelphia, Pennsylvania, have invented certain: Improvements in Yarn- Feeding 'Devicesrior Knitting-Machines. of which the following is a specification.

Liv invention relates to first class of knitby the operation stituteclfor another at different stages in the operation of the 'nmoliine iili-ose ieatnres (if-construction which const tute my inven- -tion being fully described and specifically claimed hereinafteix In the accompanying orawings Figure l is a sicle'eleration, partly in section, of sufiicient of a knitting machine of the type to which my invention relates to illustrate section on the line 5-4, Fig. 2;

saidinvention; Fig. 2 is a horizontal section on the l1neaa, Fig. 1, illustrating those parts of the attachment to which my invent-ion particularly relates; Fig. 3 is a vertical Fig; 4 is a horizontal sectionxon the line c-c, Fig! 3; Fig. 55 is'a plan View of one of the yarnfeeding'g'nidesand of the mechanism for operating the same; Fig. 6 is a similar View ""of-another yarn-guide and its operating mechanism, illustrating the same in different positionfrom'iliat shown in Fig. 5; Figs? is a section on the line -1icZ Fig. 2, illustratingyarn"severing and nipping devices and aqrarn placing device acting in s iiieid M w ,,roclcrnglnaoi 'ementhang cooperation with the yarn feeding devices; Fig. 8 1s a sect-ion on the line e-e, Fig. 1, andaF g. 9 is axvieiv of the cam for actuating the yarn-nipping and placing devices.

In Fig. 1 of the drawing, 1 represents part ohilmloweriixe-cl frame of the ma chine; and 2 part gof a fixed standard pro jeoting-n1iivardly therefrom, t lower frame 1 liaVing hearings for the various shafts; Wl1ereby*- rotat1ng .or reciprocating moverhiienris' iinparteio the needle aylinden {or she imachine; this'i'rame' false earrfw 111gilie=prv0t:sfiodfifor a levert is A coiled p I i v.

to: impart irreve- 6 wlgielnfii 3P0 tiiriefioni-r a V a L a I Specificationof Letters I Eatezzt.

iyplication filed m 13, 1912. Sex-12130. 709,279.

removed from the pattern to and i Fate ireii Jan; 5 12515;

imparted ito said lever' fi'inlany desired 5 manner, as for instancefhy znonnting jit' upon the halo of a resizing lever such as shown as 29 in Letters Patent 69759153dated April 15, 1902. i1 1 When the lower arm. ofthe lever 4 has"; been raised by the aetion'of tlief'eani againse the tension of the spring 5, an antifriction roller mosnieden astud 8 located. near the outer enrl of said lower arm of the V lever 4 1s engaged by a trigger rarer 91f mounted at 10 on the fixed franie of the machine and having a hooked arm 11' for engaging the roller on bhe stud simian-'1' other arm 12 for being acted upon by a V series of earns 13 earriedhy a pat tern drum 1- 1% to which step by step or other interinit tent movement of partial rotaiion is in1- parted by any of the ordinary meanslznown to the art, and therefore notnecessarv to be shown and described When, therefore. the lower arm of the Layer-411s raised 'hv 'the cam 6 it will he caught and held in the raisecl position lav ihel hooked arm. of the: trigger 9 until sueiili inie as on'eof the cams I 13 on the drum l 'strilres the arrn 'ofihe nigger lever, whereupon the arm" of ihe latter will be Withdrawn from engagement" with the roller on the stud Sand the lever i will be permitted to vassunie its other extreme position under the' pull .of the spring 5. i '7 Each of the cams-l3 forms p 13- Which is clamped to the) means of a screw 13, as I i so that the same ean be rea" n'i'ai disposed thereon in any relai o r desired; operation of niaciniie niay sn g -vgest 1 v I I' Y.

I A swinging been 15 .a i f t'lieiipper en I tne lever 4- 1S connected/0y, a nniiersally jointed link 16 i0 similar swing glie'ad H I Y fi 11ran arin 19' one" 20; the lesser, ta ern-er withjother 17 at the lower e K v :TOO sleeves referred to herei after, beingffree i of sftnrl 18; w igh protiownwa'r i I to un-sea 11; i ertieal shaft {21" which is i won O-PtlHS lever a performed by the machine, these intervals beingdetermined by the position of the cams 13 on the pattern drum 14. v

To a stud 23 on the arm 19 are pivoted two pawls 24'an'd 2,5, the tooth of the pawl 24 being adapted to engage with rectangular notches in the periphery of a disk 26 whose hub 27 is pinned or otherwise secured to the lower portion of the vertical shaft 21, the upper portion of said shaft being pinned or otherwise secured to the hub 28 ofa disk 29 which rests upon the top of the bracket 22 and thus provides for the vertical support of theshaft 21 and of the parts carried thereby. The tooth of the pawl engages with the peripheral notches of theaiii26 and also with the cam face or u diskpti which is maintained in a fixed position a eve thedisk 26 by reason of the factthat itshub 31 is secured to a sleeve 32 depending from the bracket22 and constihi'ting part of the bearing for the shaft 21, is shown in Fig. 3.

The tooth of the pawl 25 is, as shown at $3, 'in Fig. 1, longer than thetooth of the pawl 24 in order that said tooth 33 may en gage both with the disk 26 and with the disk 30, while'the tooth of the pawl 24 engages with the disk 26 only. The pawls 24 and 25 are held in contact with the peripheral faces of their respective disks by means of a spring 34 which connects studs 35 projecting from. 7

the pawls, as shown in Fig. 4.

The swinging movement imparted to the arm 19 is of suificient extent to cause the pawl 24 to impart t0 the disk 26 movement to the extent of one-quarter of a turn, the controlling cams mounted on the shaft 21, and which will be hereinafter referred to,- being of such configuration as to require a movement of this extent, but controlling cams of differ-ant configuration might be used which would require a movement of the dis: 96 and shaft 21 to the extent of less than one-quarter of a full turn, in which case the extent of movement of the arm 19 would be modified accordingly.

A frictional retarding device to preven overrunning of the disk 26 is provided by a tapering lug 36 carried .by a-spring arm 37 projecting from the bracket 22 and engaging correspondingly tapered notches 38 formed in the periphery of a disk which is secured to the underside of the'disk 26, as shown in Fig. 3.

The use of the pawls 24 and 25 is intended to positively lock' the disk 26 in position after each of its movements, such locking being efiected' by reason of the engagement of the abrupt forward face of the tooth of the pawl 24 with the abrupt forward Wall of-one notch in the disk 26 and, the simultaneous engagement of the abrupt rear face of- Hie tooth 33 of the pawl 25 with the abrupt will of the next succeeding notch of said disk 26, as shown 4. In order, however, that the pawl 25 may not impart engagement with said notch or disk 26 until,

on the backward swing of the arm 19, it has been carried beyond range 01' said notch.

It will not, therefore, engage with the following notch until the rearward swing of the arm 19 has been completed and the tooth of the pawl 24 is in position to enter the preceding notch.

- Mounted upon the disk 29are three cams 40, 41 and 42. which act respectively upon three levers 40 41 and 42, mounted upon a stud 43 on .the bracket 22 and each connected by means of a link 44 to that member of the yarn guiding mechanism with which it cocperates. spectively, through the levers 40 and 41 and the connecting rods, upon levers 40 and 41*, these levers carrying the usual yarn guides to, as shown in Fig. 2.

. Each of the'cams 40 and 4.1 has two low portions :22 and two high portions '1 and these cams are set upon the disk at an angle of 0 to one another so that the low portion of one cam will correspond with the high portion of the other cam. The low portion of the cam corresponds with that position of, the yarn guide and its lei'er duringwhich yarn is being fed to the needles, as shown for instance in Fig. 6, and the high part of the cam corresponds with that position of the yarn guide and its lever during which the guide is withdrawn from the needles and fails to feed yarn thereto, as shown tor instance in Fig; 5, hence, owing to the reverse disposition of the cams 40 and '41, each quarter-turn of the shaft 21 will cause a reversal in the position of the yarn guides, the one formerly in feeding position being .moved to non-feeding position, and viceversa. I

It will be noted on reference to Figs. 5

and 6 that each of the low portions :0 of the.

cams 40 and 41, corresponding to the active position of the yarn guide lever, is of greater extent than the high portions which correspond to the inactive position of The cams40 and 41 act, re-

the yarn guide lever, hence when the cams are moved the previously inactive lever will be moved to thefeeding position before the previously active lever is moved out of feeding position so as to prevent any break in v the feeding of the yarn in the needles.

The levers 40' and 41" are pivotally mounted upon a stud 45 carried an; arm

46 projecting any suitable support positioi' the yarn extending from the neeshown in Fig. 7.

provided by the knitting machine structure,

as for instance, the latch guard ring 47 with which such structures are usually provided. Another arm 48 on the ring can ries a fixed shearing and nipping blade 50 and a pivoted shearing and nipping blade 51 which cooperates with said tiXedblade 50, as The pivoted blade 51 has connected to it a pivoted rod 52 which passes through a stud 53 on a plate 54-, the outer end or" said rod 52 being threaded and provided with nuts 55 which can be adjusted to difi'erent positions thereon and which serve to lock. each other in position after .such adjustment.- The rod 52is curved to finger 56 whenever one of the thread guides on is moved into operative position and the other out of operative position. The cam 42 has four high points and our low points and the lever-.42 is acted upon by a high point of the cam at each of the successive positions of rest of the latter, this high point representing the retracted position of the stud'53 and linger 56, as shown in Fig. 2'. On every movement of the shaft 21, therefore, hack and forth movements will be imparted to the stud 53 and finger 56, one of the yarn guides to will he swung forwardly into operative position and the other yarn guide w will he swung backwardly into inoperative position. Whenever guide is moved to inoperative dles of machine to said inoperative yarn guide wi. be laid between the fixed and movable cutters 50 and 51, the latter on the forward inovement of the stud 53, being permitted to openso as to receive the yarn and on the backward movement of said stud being closed so as to sever and nip the yarn. The finger 56 moves forwardly with the stud 53 and its forked end engages the yarn which formerly extended from the blades 50 and 51, to the inoperative yarn guide and pushes said yarn forwardly into range of the needles of the machine, as said formerly inoperative yarn guide is moving ative position.

Qwing to the conformation of the 42, the finger 56 moves more quickly than the yarn guides so that the formerly inopto operer'at-ive yarn is caused to engage with said needles before the formerly operative yarn guide has been retracted so far as to withyarn for a short distance. By the time the retiring yarn guide reaches its in'operati've position the inserting finger 56 has also been fully withdrawn again and i's'in position'to receive in its forked forward end the yarn extending from said inoperativeyarn guide to the cutting and nipping blades 50cand 51.

The action of the cams 40 and 41 upon the levers 40 41 a0? and 41 is to withdraw the yarn guides from operative to inoperative position, movement in the opposite direction being T effected by. coiled springs 60 connecting studs 61 on the. Links M with studs 62 on the. projecting armof TI the bracket 22, as shown in Fig. 2', and the'action oi the cam 42 on the levers 42 and 42* tends to withdraw the stud 53 and finger 56 to inoperative position the movement of these parts to operative position losing ef'ected by a similar spring 66 con- 35 nesting similar studs on the link 44: and bracket.

The cam 42 has adjacent to each high point on the ascending side of the cam a face at a lesser angle than the face 64 300 whichconstitutes the beginning of the ascending side of the cam, the purpose of this change of angle being to reduce the speed of the backward movement of the stud 53 v as it approaches the limit of such backward Inevement so as to, lessen the force of the blow of said stud upon the nuts 55 and also to effect a relatively slow closing movement of the blades 50 and 51 so as to insure the laying between the same of the yarn extending from the needles to the yarn guide which is just being rendered inoperative.

I claim:

1. The combination in yarn feeding de vices for knitting machines, of a plurality of yarn guides means for moving said yarn guides to operative or inoperative position,

.means for nipping the yarn from the guide yarn guides, means for moving said yarn guides tooperative or inoperative position, means for nipping the yarn from the guide which is being moved to inoperative posh tion, a finger for acting upon theyarn' from the guide Whichis being moved to operative position and causing said yarn to en gage ith the needles, said finger and the devices for operatingthe yarn nipper being mounted on one and the same carrier, and means for moving said carrier independently of the yarn guides so as to cause the finger to apply the yarn to the needles before the yarn guide has reached its operative position. I

3. The combination in a yarn feeding device for knitting machines, of a plurality of yarn guides, means for moving the same into and out 01": operative position, a finger for acting upon the yarn vfrom the guide Which is being moved to operative position and causing said ya'rn to engage with. the need1es,a movable carrier for said finger, yarn nipping blades, a swinging operating device therefor mounted upon the same car- '25 tier as the finger, and anadjustable con nection between the sa d swinging device and he movable member of the nippers.

1. In yarn feeding devices for knitting machines, the combination of a plurality of yarn guides, means including cams for moving said yarn guides to operative or inoperative position, and means for imparting movements of partial rotation to said cams, said means hicludin'g a disk with notched periphery, a swinging arm with right and left'pawls thereon for engaging successive notches in said disk, and a cam for holding said left hand pawl out of position to engage -a notch when it first begins to move backwardly.

Intestimony whereof, I have signed my 

